Meanwhile, Adam Levine will look to former Creedence Clearwater Revival frontman and guitar legend John Fogerty—with whom he performed during last season's finale—to be his team's mentor, while Blake Shelton will get the help of fellow country star Brad Paisley as he looks to nab another win.

Meghan Trainor, Alicia Keys and Ellie Goulding have all served as mentors along the show's recent seasons. Pharrell's 16-year-old contestant Sawyer Fredericks was deemed Season 8 champion in the spring after performing tunes like "I am a Man of Constant Sorrow" and "Simple Man."

What do you think of the newest Voice additions? Share your thoughts in the comments below, and be sure to tune in to the new season on September 21 on NBC!